proper IP camera/ mobile phone camera dont use USB, they use MIPI or CSI2 to interface with MPU.
USB webcam is just for some hobby/demo use. On Mon, Feb 23, 2015 at 1:23 PM, William Hermans <[email protected]> wrote: > id imagije if you used IP cameras, You could do a couple more. The BBB's > Ethernet port is as fast as fast Ethernet gets to theoretical. > > On Sun, Feb 22, 2015 at 6:00 PM, Alvaro Garcia <[email protected]> wrote: > >> The max framerate you will get is 15 fps, no matter about USB speed. It >> is because of DMA problem or something. I tried several cameras and could >> get more than 15 fps (trying yuv, mjpeg, x264...) >> >> 2015-02-23 1:19 GMT+01:00 Alex de Geofroy <[email protected]>: >> >>> Thanks Robert, >>> >>> As a side note, thank you for all the help you provide people here and >>> elsewhere. I haven't been very active in this group, but I've been >>> subscribing and reading for a while. I guess the phrase "Long time >>> listener, first time caller" would be appropriate. >>> >>> Anyway, USB 2.0 will transfer at 480 Mbps (in the best case) which is >>> twice the bandwidth I'd need to run four 1080p30 cameras streaming MJPEG at >>> approximately 60 Mbps, or roughly four times the bandwidth I'd need for >>> 720p30. >>> >>> So let's assume that we won't have a bottleneck on the USB, and I'll >>> save the videos to a NAS over Ethernet (USB & Ethernet are not shared, >>> right?) so we won't have a bandwidth issue there either. If this is true, >>> would the BBB have the horsepower to run motion detection on all four >>> streams and output to a NAS reliably? If not four cameras, how about 3, or >>> 2? >>> >>> I understand that this is a pretty specific case and I might just have >>> to try it out to see what it can handle, I'm just trying to get a feel for >>> whether or not it's even worth trying with a BBB, or if I should look for a >>> higher-end board and cough up the extra cash. >>> >>> Thanks again! >>> >>> On Sun, Feb 22, 2015 at 6:56 PM, Robert Nelson <[email protected]> >>> wrote: >>> >>>> On Sun, Feb 22, 2015 at 5:48 PM, Alex DG <[email protected]> wrote: >>>> > I've been playing around with my BBB for a couple months now and I >>>> love it. >>>> > I've currently got it set up streaming video to my website 24/7. >>>> > >>>> > I'm now wondering how many USB cameras I could reasonably expect to >>>> use on >>>> > this thing at one time, because I want to set up a sort of improved IP >>>> > camera system. Essentially I want to create a networked array of HD >>>> cameras, >>>> > so I'm trying to decide which SBC would be able to reliably record >>>> 720p or >>>> > 1080p video from as many cameras as possible. The cameras need to run >>>> 24/7, >>>> > detect motion, perform some CV tasks (using opencv, presumably), and >>>> save >>>> > the resulting clips to a NAS, or even just to a USB hard drive. >>>> > >>>> > So let's say I want to set up an array of 720p30 cameras and record >>>> and >>>> > process video from them. Using a USB hub, would the BBB handle 2, 3, >>>> or even >>>> > 4 cameras? What if the frame rate was 60 fps? Or what about 2, 3, or 4 >>>> > 1080p30 cameras? >>>> > >>>> > I'm just trying to get a feel for how capable the BBB is, or if I >>>> should >>>> > look toward a different, more powerful SBC. >>>> > >>>> > Thanks in advance for any advice you can offer! >>>> >>>> Remember, usb is a shared resource. With only one port on the BBB, >>>> depending on how much bandwidth the first camera takes will let you >>>> know how many you can have plugged in. >>>> >>>> Regards, >>>> >>>> -- >>>> Robert Nelson >>>> http://www.rcn-ee.com/ >>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "BeagleBoard" group. >>>> To unsubscribe from this topic, visit >>>> https://groups.google.com/d/topic/beagleboard/a3-AuBq9eyo/unsubscribe. >>>> To unsubscribe from this group and all its topics, send an email to >>>> [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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